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[PWGLF] Select MC charged particles #11850

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Merged
abmodak merged 2 commits into from
Jun 30, 2025
Merged

[PWGLF] Select MC charged particles #11850

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212630c
Select MC charged particles
omvazque Jun 30, 2025
e391675
Select MC charged particles v2
omvazque Jun 30, 2025
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113 changes: 91 additions & 22 deletions PWGLF/Tasks/GlobalEventProperties/uccZdc.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,7 @@ struct UccZdc {

static constexpr float kCollEnergy{2.68};
static constexpr float kZero{0.};
static constexpr float kMinCharge{3.f};

// Configurables Event Selection
Configurable<bool> isNoCollInTimeRangeStrict{"isNoCollInTimeRangeStrict", true, "use isNoCollInTimeRangeStrict?"};
Expand Down Expand Up @@ -710,6 +711,7 @@ struct UccZdc {

std::vector<float> pTs;
std::vector<float> vecFD;
std::vector<float> vecEff;
std::vector<float> vecOneOverEff;

// Calculates the Nch multiplicity
Expand Down Expand Up @@ -747,7 +749,7 @@ struct UccZdc {
// Fill vectors for [pT] measurement
pTs.clear();
vecFD.clear();
vecOneOverEff.clear();
vecEff.clear();
for (const auto& track : tracks) {
// Track Selection
if (!track.isGlobalTrack()) {
Expand All @@ -771,7 +773,7 @@ struct UccZdc {
}
if ((effValue > 0.) && (fdValue > 0.)) {
pTs.emplace_back(pt);
vecOneOverEff.emplace_back(1. / effValue);
vecEff.emplace_back(effValue);
vecFD.emplace_back(fdValue);
}
// To calculate event-averaged <pt>
Expand All @@ -780,7 +782,7 @@ struct UccZdc {

double p1, p2, p3, p4, w1, w2, w3, w4;
p1 = p2 = p3 = p4 = w1 = w2 = w3 = w4 = 0.0;
getPTpowers(pTs, vecOneOverEff, vecFD, p1, w1, p2, w2, p3, w3, p4, w4);
getPTpowers(pTs, vecEff, vecFD, p1, w1, p2, w2, p3, w3, p4, w4);

// EbE one-particle pT correlation
double oneParCorr{p1 / w1};
Expand Down Expand Up @@ -819,6 +821,7 @@ struct UccZdc {

// Preslice<aod::McParticles> perMCCollision = aod::mcparticle::mcCollisionId;
Preslice<TheFilteredSimTracks> perCollision = aod::track::collisionId;
Service<o2::framework::O2DatabasePDG> pdg;
TRandom* randPointer = new TRandom();
void processMCclosure(aod::McCollisions::iterator const& mccollision, soa::SmallGroups<o2::aod::SimCollisions> const& collisions, o2::aod::BCsRun3 const& /*bcs*/, aod::FT0s const& /*ft0s*/, aod::McParticles const& mcParticles, TheFilteredSimTracks const& simTracks)
{
Expand Down Expand Up @@ -879,9 +882,10 @@ struct UccZdc {
return;
}

std::vector<float> pTs;
std::vector<float> vecFD;
std::vector<float> vecOneOverEff;
std::vector<double> pTs;
std::vector<double> vecFD;
std::vector<double> vecEff;
std::vector<double> vecOneOverEffXFD;
// std::vector<float> wIs;
const auto& groupedTracks{simTracks.sliceBy(perCollision, collision.globalIndex())};

Expand All @@ -901,6 +905,8 @@ struct UccZdc {
}

// Calculates the event weight, W_k
const int foundNchBin{efficiency->GetXaxis()->FindBin(nchRaw)};

for (const auto& track : groupedTracks) {
// Track Selection
if (track.eta() < minEta || track.eta() > maxEta) {
Expand All @@ -912,32 +918,51 @@ struct UccZdc {
if (!track.isGlobalTrack()) {
continue;
}
if (!track.has_mcParticle()) {
continue;
}
const auto& particle{track.mcParticle()};

float pt{track.pt()};
int foundNchBin{efficiency->GetXaxis()->FindBin(nchRaw)};
int foundPtBin{efficiency->GetYaxis()->FindBin(pt)};
float effValue{1.};
float fdValue{1.};
auto charge{0.};
// Get the MC particle
auto* pdgParticle = pdg->GetParticle(particle.pdgCode());
if (pdgParticle != nullptr) {
charge = pdgParticle->Charge();
} else {
continue;
}

// Is it a charged particle?
if (std::abs(charge) < kMinCharge) {
continue;
}
// Is it a primary particle?
// if (!particle.isPhysicalPrimary()) { continue; }

const double pt{static_cast<double>(track.pt())};
const int foundPtBin{efficiency->GetYaxis()->FindBin(pt)};
double effValue{1.};
double fdValue{1.};

if (applyEff) {
effValue = efficiency->GetBinContent(foundNchBin, foundPtBin);
fdValue = fd->GetBinContent(fd->FindBin(pt));
}
if ((effValue > 0.) && (fdValue > 0.)) {
pTs.emplace_back(pt);
vecOneOverEff.emplace_back(1. / effValue);
vecEff.emplace_back(effValue);
vecFD.emplace_back(fdValue);
vecOneOverEffXFD.emplace_back(fdValue / effValue);
}
}

nchMult = std::accumulate(vecOneOverEff.begin(), vecOneOverEff.end(), 0);
nchMult = std::accumulate(vecOneOverEffXFD.begin(), vecOneOverEffXFD.end(), 0);
if (nchMult < minNchSel) {
return;
}

double p1, p2, p3, p4, w1, w2, w3, w4;
p1 = p2 = p3 = p4 = w1 = w2 = w3 = w4 = 0.0;
getPTpowers(pTs, vecOneOverEff, vecFD, p1, w1, p2, w2, p3, w3, p4, w4);
getPTpowers(pTs, vecEff, vecFD, p1, w1, p2, w2, p3, w3, p4, w4);

const double denTwoParCorr{std::pow(w1, 2.) - w2};
const double numTwoParCorr{std::pow(p1, 2.) - p2};
Expand Down Expand Up @@ -971,6 +996,21 @@ struct UccZdc {
if (particle.pt() < minPt || particle.pt() > maxPt) {
continue;
}

auto charge{0.};
// Get the MC particle
auto* pdgParticle = pdg->GetParticle(particle.pdgCode());
if (pdgParticle != nullptr) {
charge = pdgParticle->Charge();
} else {
continue;
}

// Is it a charged particle?
if (std::abs(charge) < kMinCharge) {
continue;
}
// Is it a primary particle?
if (!particle.isPhysicalPrimary()) {
continue;
}
Expand Down Expand Up @@ -1044,9 +1084,23 @@ struct UccZdc {
if (!track.has_mcParticle()) {
continue;
}
registry.fill(HIST("Pt_all_ch"), nchRaw, track.pt());

// Get the MC particle
const auto& particle{track.mcParticle()};
auto charge{0.};
auto* pdgParticle = pdg->GetParticle(particle.pdgCode());
if (pdgParticle != nullptr) {
charge = pdgParticle->Charge();
} else {
continue;
}

// Is it a charged particle?
if (std::abs(charge) < kMinCharge) {
continue;
}
// All charged particles
registry.fill(HIST("Pt_all_ch"), nchRaw, track.pt());
// Is it a primary particle?
if (!particle.isPhysicalPrimary()) {
continue;
}
Expand Down Expand Up @@ -1075,6 +1129,21 @@ struct UccZdc {
if (particle.pt() < minPt || particle.pt() > maxPt) {
continue;
}

auto charge{0.};
// Get the MC particle
auto* pdgParticle = pdg->GetParticle(particle.pdgCode());
if (pdgParticle != nullptr) {
charge = pdgParticle->Charge();
} else {
continue;
}

// Is it a charged particle?
if (std::abs(charge) < kMinCharge) {
continue;
}
// Is it a primary particle?
if (!particle.isPhysicalPrimary()) {
continue;
}
Expand All @@ -1101,14 +1170,14 @@ struct UccZdc {
PROCESS_SWITCH(UccZdc, processMCclosure, "Process MC closure", false);

template <typename T, typename U>
void getPTpowers(const T& pTs, const T& vecOneOverEff, const T& vecFD, U& pOne, U& wOne, U& pTwo, U& wTwo, U& pThree, U& wThree, U& pFour, U& wFour)
void getPTpowers(const T& pTs, const T& vecEff, const T& vecFD, U& pOne, U& wOne, U& pTwo, U& wTwo, U& pThree, U& wThree, U& pFour, U& wFour)
{
pOne = wOne = pTwo = wTwo = pThree = wThree = pFour = wFour = 0.;
for (std::size_t i = 0; i < pTs.size(); ++i) {
const float pTi{pTs.at(i)};
const float eFFi{vecOneOverEff.at(i)};
const float fDi{vecFD.at(i)};
const float wEighti{eFFi * fDi};
const double pTi{pTs.at(i)};
const double eFFi{vecEff.at(i)};
const double fDi{vecFD.at(i)};
const double wEighti{std::pow(eFFi, -1.) * fDi};
pOne += wEighti * pTi;
wOne += wEighti;
pTwo += std::pow(wEighti * pTi, 2.);
Expand Down
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